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Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 31, 2019	May 25, 2019	Feb. 23, 2019	Nov. 24, 2018	Aug. 25, 2018	May 26, 2018	Feb. 24, 2018	Nov. 25, 2017	Aug. 31, 2019	Aug. 25, 2018	Aug. 26, 2017	Aug. 26, 2018
Segment Reporting Information [Line Items]
Revenues	$ 479,621	$ 453,720	$ 437,485	$ 438,550	$ 434,063	$ 427,384	$ 419,264	$ 415,778	$ 1,809,376	$ 1,696,489	$ 1,590,958
Income (loss) from operations									232,008	182,376	110,283
Interest (income) expense, net									(9,082)	(5,543)	(4,269)
Income (loss) before taxes									237,924	187,246	115,123
Depreciation and amortization									103,333	96,662	88,879
Capital expenditures									119,815	112,747	108,554
Total assets	2,047,320				1,843,386				2,047,320	1,843,386	1,819,128	$ 1,899,180
US and Canadian Rental and Cleaning \| Operating Segments
Segment Reporting Information [Line Items]
Revenues									1,582,416	1,485,548	1,415,423
Income (loss) from operations									235,046	213,322	200,585
Interest (income) expense, net									(4,105)	(3,927)	(3,371)
Income (loss) before taxes									239,122	217,252	204,108
Depreciation and amortization									69,376	64,481	59,899
Capital expenditures									115,071	105,481	104,984
Total assets	1,865,713				1,670,713				1,865,713	1,670,713	1,667,540
MFG \| Operating Segments
Segment Reporting Information [Line Items]
Revenues									254,218	247,530	206,572
Income (loss) from operations									84,248	89,035	76,115
Income (loss) before taxes									84,008	88,856	75,738
Depreciation and amortization									2,384	2,238	2,185
Capital expenditures									401	2,882	1,079
Total assets	36,376				33,622				36,376	33,622	34,045
MFG \| Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues									(254,111)	(247,424)	(206,316)
Income (loss) from operations									1,128	(9,658)	(3,415)
Income (loss) before taxes									1,128	(9,658)	(3,415)
Corporate \| Operating Segments
Segment Reporting Information [Line Items]
Revenues									33,682	37,994	26,470
Income (loss) from operations									(107,468)	(129,111)	(176,978)
Interest (income) expense, net									(4,977)	(1,616)	(898)
Income (loss) before taxes									(104,742)	(127,510)	(175,595)
Depreciation and amortization									25,098	24,108	20,866
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues									1,616,205	1,523,648	1,442,149
Income (loss) from operations									212,954	163,588	96,307
Interest (income) expense, net									(9,082)	(5,543)	(4,269)
Income (loss) before taxes									219,516	168,940	100,836
Depreciation and amortization									96,858	90,827	82,950
Capital expenditures									115,472	108,363	106,063
Total assets	1,902,089				1,704,335				1,902,089	1,704,335	1,701,585
Specialty Garments
Segment Reporting Information [Line Items]
Revenues									132,767	118,477	98,024
Specialty Garments \| Operating Segments
Segment Reporting Information [Line Items]
Revenues									132,767	118,477	98,024
Income (loss) from operations									14,145	14,070	9,018
Income (loss) before taxes									13,499	13,589	9,329
Depreciation and amortization									4,759	4,244	4,429
Capital expenditures									3,423	3,781	1,737
Total assets	110,335				110,811				110,335	110,811	87,767
First Aid
Segment Reporting Information [Line Items]
Revenues									60,404	54,364	50,785
First Aid \| Operating Segments
Segment Reporting Information [Line Items]
Revenues									60,404	54,364	50,785
Income (loss) from operations									4,909	4,718	4,958
Income (loss) before taxes									4,909	4,717	4,958
Depreciation and amortization									1,716	1,591	1,500
Capital expenditures									920	603	754
Total assets	$ 34,896				$ 28,240				$ 34,896	$ 28,240	$ 29,776